Here is a cool infographic for The Lord of the Rings trilogy created by University of Florida student JT Fridsma. The inforgraphic below gives us a minute-by-minute plotting of the various scenes and parallel plots in Peter Jackson's film adaptation. Click on the image below to get a closer look:

The center of the graphic is a map of Middle Earth. The arc circling it gives a running count of screentime minutes. The red lines indicate the progress of the various characters. Check it out below for yourself: